Question #N1020

The author of the passage suggests that the invention of optical tweezers is a major breakthrough in medical and scientific research. The text provides an example of this breakthrough: a new way to manipulate particles for study. This is an example of what the text claims is a major breakthrough.

Which choice provides the best transition to complete the passage, maintaining the conventions of Standard English?
A. Thus,
B. In other words,
C. For example,
D. However,